Datasheet

UNISONIC TECHNOLOGIES CO., LTD
L1183B
CMOS IC
300mA CMOS LDO

DESCRIPTION
The UTC L1183B is a positive, linear regulator. One of the feature
is the very low ground current typically as low as 30μA, and the
dropout voltage is extremely low. For stable operation, the output
capacitance value should be 2.2μF or more.
The internal circuit includes thermal shutdown and current
fold-back device to prevent device failure when the circuit is
operated in bad conditions.
The UTC L1183B is generally suitable for applications, such as
instrumentation, portable electronics, wireless devices, cordless
phones, PC peripherals, battery powered widgets.

6
5
4
1
2
3
SOT-26
FEATURES
* Very Low Dropout Voltage
* Guaranteed Output Current: 300mA
* Quiescent Current: 30μA (TYP.)
* Typical Accuracy Within 2%
* Over-Temperature Shutdown
* Current Limiting
* Short Circuit Current Fold-Back
* Power Good Detector (6 pin version only)
* Power-Saving Shutdown Mode
* Adjustable Output Voltages
* Low Temperature Coefficient
* RoHS-Compliant Product

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
L1183BG-xx-AG6-R
L1183BG-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
Package
Packing
SOT-26
Tape Reel
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QW-R502-422.C
L1183B

CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-26
12 :1.2V
15 :1.5V
28 :2.8V
31 :3.1V
33 :3.3V

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO
1
2
3
4
5
6

PIN NAME
VIN
GND
EN
PG
ADJ
VOUT
MARKING
6 5
4
G: Halogen Free
SXXBG
1
2
L: Lead Free
Voltage Code
3
DESCRIPTION
Input voltage pin
Ground connection pin
Enable pin
Power-Good output
Feedback output voltage for adjustable device
LDO voltage regulator output pin
BLOCK DIAGRAM
IN
Thermal
Shutdown
Overcurrent
Shutdown
EN
OUT
-
VREF×110%
+
-
PG
AMP
+
ADJ
+
VREF×90%
Vref=1.2V
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 4
QW-R502-422.C
L1183B

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
8
V
Input, Output Voltage
GND - 0.3 ~ VIN + 0.3
V
Output Current
IOUT
PD / (VIN - VOUT)
mA
Power Dissipation
PD
400
mW
Operating Temperature
TOPR
-40 ~ +85
°C
Junction Temperature
TJ
-40 ~ +125
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATINGS
280
140
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (TA = 25°C, VIN=5V unless otherwise specified)
PARAMETER
Input Voltage
Output Voltage
SYMBOL
VIN
VOUT
Dropout Voltage
VD
Output Current
Current Limit
Short Circuit Current
Quiescent Current
Ground Pin Current
IOUT
ILIMIT
ISC
IQ
IGND
Line Regulation
REGLINE
Load Regulation
Over Temperature Shutdown
Over Temperature Hysterisis
VO Temperature Coefficient
REGLOAD
OTS
OTH
TC
Power Supply Rejection
Output Voltage Noise
ADJ Input Bias Current
ADJ Reference Voltage
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Output Voltage
Output Under Voltage
Output Over Voltage
PG Leakage Current
PG Voltage Rating
PG Voltage Low
Note: VIN(MIN)=VOUT+VD
PSRR
eN
IADJ
VREF
VEH
VEL
IEH
IEL
ISD
VOUT,SD
VUV
VOV
ILC
VPG
VOL
TEST CONDITIONS
IOUT=1mA
IOUT=300mA
VOUT=VONOM
-2.0%
1.2V≤VO(NOM) ≤2.0V
2.0V<VO(NOM) ≤2.8V
2.8V<VO(NOM)<3.8V
VOUT>1.2V
VOUT>1.2V
VOUT<0.8V
IOUT=0mA
IOUT=1mA ~ 300mA
IOUT=5mA
VIN=VO+1 ~ VO+2
IOUT=1mA ~ 300mA
300
300
VOUT < 2.0V
VOUT ≥ 2.0V
IOUT=100mA
CO=2.2μF
f=1kHz
f=10kHz
f=100kHz
f=10Hz ~ 100kHz
IO=10mA,CBYP=0μF
CO=2.2μF
VIN=2.7V ~ 7V
VIN=2.7V ~ 7V
VEN=VIN, VIN=2.7V ~ 7V
VEN=0V, VIN=2.7V ~ 7V
VIN=5V, VO=0V, VEN<VEL
IO=35μA,VEN<VEL
TYP MAX
7
3
1300
400
300
1.176
2.0
0
0
UNIT
V
%
mV
mA
mA
300
mA
50
μA
μA
0.15
%
0.02 0.1
%
0.2
1
%
150
°C
30
°C
30
ppm/°C
50
dB
20
15
450
150
30
35
30
115
VPG=7V
VO in regulation
ISINK=0.4mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
Note
-3
μVrms
1
μA
1.2 1.224
V
VIN
V
0.4
V
0.1
μA
0.5
μA
0.5
1
μA
0.1
V
85 %VO(NOM)
%VO(NOM)
1
μA
7
V
0.4
V
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QW-R502-422.C
L1183B
CMOS IC
ADVANCED APPLICATION

VIN=3.3V
100K
VIN
VOUT
PG
1µ
100µ
100
VO=1.2V
ADJ
EN
100µ
GND
10K

TYPICAL APPLICATION CIRCUIT
EN
IN
+
5V
R1
IN
C1
1µF
PG
OUT
OUT
EN
GND
C2
100p
C3
2.2µF
ADJ
R2
VOUT= 1.2 (R1 +R2)/R2
C2 is unnecessary when R1 or R2 < 20K
PG pin is only available in the SOT-26 package option
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-422.C
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